crypto/evp/e_aria.c

   1 /*
   2  * Copyright 2017-2021 The OpenSSL Project Authors. All Rights Reserved.
   3  * Copyright (c) 2017, Oracle and/or its affiliates.  All rights reserved.
   4  *
   5  * Licensed under the Apache License 2.0 (the "License").  You may not use
   6  * this file except in compliance with the License.  You can obtain a copy
   7  * in the file LICENSE in the source distribution or at
   8  * https://www.openssl.org/source/license.html
   9  */
  10
  11 #include "internal/cryptlib.h"
  12 #ifndef OPENSSL_NO_ARIA
  13 # include <openssl/evp.h>
  14 # include <openssl/modes.h>
  15 # include <openssl/rand.h>
  16 # include "crypto/aria.h"
  17 # include "crypto/evp.h"
  18 # include "crypto/modes.h"
  19 # include "evp_local.h"
  20
  21 /* ARIA subkey Structure */
  22 typedef struct {
  23     ARIA_KEY ks;
  24 } EVP_ARIA_KEY;
  25
  26 /* ARIA GCM context */
  27 typedef struct {
  28     union {
  29         OSSL_UNION_ALIGN;
  30         ARIA_KEY ks;
  31     } ks;                       /* ARIA subkey to use */
  32     int key_set;                /* Set if key initialised */
  33     int iv_set;                 /* Set if an iv is set */
  34     GCM128_CONTEXT gcm;
  35     unsigned char *iv;          /* Temporary IV store */
  36     int ivlen;                  /* IV length */
  37     int taglen;
  38     int iv_gen;                 /* It is OK to generate IVs */
  39     int tls_aad_len;            /* TLS AAD length */
  40 } EVP_ARIA_GCM_CTX;
  41
  42 /* ARIA CCM context */
  43 typedef struct {
  44     union {
  45         OSSL_UNION_ALIGN;
  46         ARIA_KEY ks;
  47     } ks;                       /* ARIA key schedule to use */
  48     int key_set;                /* Set if key initialised */
  49     int iv_set;                 /* Set if an iv is set */
  50     int tag_set;                /* Set if tag is valid */
  51     int len_set;                /* Set if message length set */
  52     int L, M;                   /* L and M parameters from RFC3610 */
  53     int tls_aad_len;            /* TLS AAD length */
  54     CCM128_CONTEXT ccm;
  55     ccm128_f str;
  56 } EVP_ARIA_CCM_CTX;
  57
  58 /* The subkey for ARIA is generated. */
  59 static int aria_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
  60                             const unsigned char *iv, int enc)
  61 {
  62     int ret;
  63     int mode = EVP_CIPHER_CTX_mode(ctx);
  64
  65     if (enc || (mode != EVP_CIPH_ECB_MODE && mode != EVP_CIPH_CBC_MODE))
  66         ret = ossl_aria_set_encrypt_key(key, EVP_CIPHER_CTX_key_length(ctx) * 8,
  67                                         EVP_CIPHER_CTX_get_cipher_data(ctx));
  68     else
  69         ret = ossl_aria_set_decrypt_key(key, EVP_CIPHER_CTX_key_length(ctx) * 8,
  70                                         EVP_CIPHER_CTX_get_cipher_data(ctx));
  71     if (ret < 0) {
  72         ERR_raise(ERR_LIB_EVP,EVP_R_ARIA_KEY_SETUP_FAILED);
  73         return 0;
  74     }
  75     return 1;
  76 }
  77
  78 static void aria_cbc_encrypt(const unsigned char *in, unsigned char *out,
  79                              size_t len, const ARIA_KEY *key,
  80                              unsigned char *ivec, const int enc)
  81 {
  82
  83     if (enc)
  84         CRYPTO_cbc128_encrypt(in, out, len, key, ivec,
  85                               (block128_f) ossl_aria_encrypt);
  86     else
  87         CRYPTO_cbc128_decrypt(in, out, len, key, ivec,
  88                               (block128_f) ossl_aria_encrypt);
  89 }
  90
  91 static void aria_cfb128_encrypt(const unsigned char *in, unsigned char *out,
  92                                 size_t length, const ARIA_KEY *key,
  93                                 unsigned char *ivec, int *num, const int enc)
  94 {
  95
  96     CRYPTO_cfb128_encrypt(in, out, length, key, ivec, num, enc,
  97                           (block128_f) ossl_aria_encrypt);
  98 }
  99
 100 static void aria_cfb1_encrypt(const unsigned char *in, unsigned char *out,
 101                               size_t length, const ARIA_KEY *key,
 102                               unsigned char *ivec, int *num, const int enc)
 103 {
 104     CRYPTO_cfb128_1_encrypt(in, out, length, key, ivec, num, enc,
 105                             (block128_f) ossl_aria_encrypt);
 106 }
 107
 108 static void aria_cfb8_encrypt(const unsigned char *in, unsigned char *out,
 109                               size_t length, const ARIA_KEY *key,
 110                               unsigned char *ivec, int *num, const int enc)
 111 {
 112     CRYPTO_cfb128_8_encrypt(in, out, length, key, ivec, num, enc,
 113                             (block128_f) ossl_aria_encrypt);
 114 }
 115
 116 static void aria_ecb_encrypt(const unsigned char *in, unsigned char *out,
 117                              const ARIA_KEY *key, const int enc)
 118 {
 119     ossl_aria_encrypt(in, out, key);
 120 }
 121
 122 static void aria_ofb128_encrypt(const unsigned char *in, unsigned char *out,
 123                              size_t length, const ARIA_KEY *key,
 124                              unsigned char *ivec, int *num)
 125 {
 126     CRYPTO_ofb128_encrypt(in, out, length, key, ivec, num,
 127                          (block128_f) ossl_aria_encrypt);
 128 }
 129
 130 IMPLEMENT_BLOCK_CIPHER(aria_128, ks, aria, EVP_ARIA_KEY,
 131                         NID_aria_128, 16, 16, 16, 128,
 132                         0, aria_init_key, NULL,
 133                         EVP_CIPHER_set_asn1_iv,
 134                         EVP_CIPHER_get_asn1_iv,
 135                         NULL)
 136 IMPLEMENT_BLOCK_CIPHER(aria_192, ks, aria, EVP_ARIA_KEY,
 137                         NID_aria_192, 16, 24, 16, 128,
 138                         0, aria_init_key, NULL,
 139                         EVP_CIPHER_set_asn1_iv,
 140                         EVP_CIPHER_get_asn1_iv,
 141                         NULL)
 142 IMPLEMENT_BLOCK_CIPHER(aria_256, ks, aria, EVP_ARIA_KEY,
 143                         NID_aria_256, 16, 32, 16, 128,
 144                         0, aria_init_key, NULL,
 145                         EVP_CIPHER_set_asn1_iv,
 146                         EVP_CIPHER_get_asn1_iv,
 147                         NULL)
 148
 149 # define IMPLEMENT_ARIA_CFBR(ksize,cbits) \
 150                 IMPLEMENT_CFBR(aria,aria,EVP_ARIA_KEY,ks,ksize,cbits,16,0)
 151 IMPLEMENT_ARIA_CFBR(128,1)
 152 IMPLEMENT_ARIA_CFBR(192,1)
 153 IMPLEMENT_ARIA_CFBR(256,1)
 154 IMPLEMENT_ARIA_CFBR(128,8)
 155 IMPLEMENT_ARIA_CFBR(192,8)
 156 IMPLEMENT_ARIA_CFBR(256,8)
 157
 158 # define BLOCK_CIPHER_generic(nid,keylen,blocksize,ivlen,nmode,mode,MODE,flags) \
 159 static const EVP_CIPHER aria_##keylen##_##mode = { \
 160         nid##_##keylen##_##nmode,blocksize,keylen/8,ivlen, \
 161         flags|EVP_CIPH_##MODE##_MODE,   \
 162         aria_init_key,                  \
 163         aria_##mode##_cipher,           \
 164         NULL,                           \
 165         sizeof(EVP_ARIA_KEY),           \
 166         NULL,NULL,NULL,NULL };          \
 167 const EVP_CIPHER *EVP_aria_##keylen##_##mode(void) \
 168 { return &aria_##keylen##_##mode; }
 169
 170 static int aria_ctr_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 171                                const unsigned char *in, size_t len)
 172 {
 173     unsigned int num = EVP_CIPHER_CTX_num(ctx);
 174     EVP_ARIA_KEY *dat = EVP_C_DATA(EVP_ARIA_KEY, ctx);
 175
 176     CRYPTO_ctr128_encrypt(in, out, len, &dat->ks, ctx->iv,
 177                           EVP_CIPHER_CTX_buf_noconst(ctx), &num,
 178                           (block128_f) ossl_aria_encrypt);
 179     EVP_CIPHER_CTX_set_num(ctx, num);
 180     return 1;
 181 }
 182
 183 BLOCK_CIPHER_generic(NID_aria, 128, 1, 16, ctr, ctr, CTR, 0)
 184 BLOCK_CIPHER_generic(NID_aria, 192, 1, 16, ctr, ctr, CTR, 0)
 185 BLOCK_CIPHER_generic(NID_aria, 256, 1, 16, ctr, ctr, CTR, 0)
 186
 187 /* Authenticated cipher modes (GCM/CCM) */
 188
 189 /* increment counter (64-bit int) by 1 */
 190 static void ctr64_inc(unsigned char *counter)
 191 {
 192     int n = 8;
 193     unsigned char c;
 194
 195     do {
 196         --n;
 197         c = counter[n];
 198         ++c;
 199         counter[n] = c;
 200         if (c)
 201             return;
 202     } while (n);
 203 }
 204
 205 static int aria_gcm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 206                                  const unsigned char *iv, int enc)
 207 {
 208     int ret;
 209     EVP_ARIA_GCM_CTX *gctx = EVP_C_DATA(EVP_ARIA_GCM_CTX,ctx);
 210
 211     if (!iv && !key)
 212         return 1;
 213     if (key) {
 214         ret = ossl_aria_set_encrypt_key(key, EVP_CIPHER_CTX_key_length(ctx) * 8,
 215                                         &gctx->ks.ks);
 216         CRYPTO_gcm128_init(&gctx->gcm, &gctx->ks,
 217                            (block128_f) ossl_aria_encrypt);
 218         if (ret < 0) {
 219             ERR_raise(ERR_LIB_EVP,EVP_R_ARIA_KEY_SETUP_FAILED);
 220             return 0;
 221         }
 222
 223         /*
 224          * If we have an iv can set it directly, otherwise use saved IV.
 225          */
 226         if (iv == NULL && gctx->iv_set)
 227             iv = gctx->iv;
 228         if (iv) {
 229             CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen);
 230             gctx->iv_set = 1;
 231         }
 232         gctx->key_set = 1;
 233     } else {
 234         /* If key set use IV, otherwise copy */
 235         if (gctx->key_set)
 236             CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen);
 237         else
 238             memcpy(gctx->iv, iv, gctx->ivlen);
 239         gctx->iv_set = 1;
 240         gctx->iv_gen = 0;
 241     }
 242     return 1;
 243 }
 244
 245 static int aria_gcm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
 246 {
 247     EVP_ARIA_GCM_CTX *gctx = EVP_C_DATA(EVP_ARIA_GCM_CTX,c);
 248
 249     switch (type) {
 250     case EVP_CTRL_INIT:
 251         gctx->key_set = 0;
 252         gctx->iv_set = 0;
 253         gctx->ivlen = EVP_CIPHER_iv_length(c->cipher);
 254         gctx->iv = c->iv;
 255         gctx->taglen = -1;
 256         gctx->iv_gen = 0;
 257         gctx->tls_aad_len = -1;
 258         return 1;
 259
 260     case EVP_CTRL_GET_IVLEN:
 261         *(int *)ptr = gctx->ivlen;
 262         return 1;
 263
 264     case EVP_CTRL_AEAD_SET_IVLEN:
 265         if (arg <= 0)
 266             return 0;
 267         /* Allocate memory for IV if needed */
 268         if ((arg > EVP_MAX_IV_LENGTH) && (arg > gctx->ivlen)) {
 269             if (gctx->iv != c->iv)
 270                 OPENSSL_free(gctx->iv);
 271             if ((gctx->iv = OPENSSL_malloc(arg)) == NULL) {
 272                 ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
 273                 return 0;
 274             }
 275         }
 276         gctx->ivlen = arg;
 277         return 1;
 278
 279     case EVP_CTRL_AEAD_SET_TAG:
 280         if (arg <= 0 || arg > 16 || EVP_CIPHER_CTX_encrypting(c))
 281             return 0;
 282         memcpy(EVP_CIPHER_CTX_buf_noconst(c), ptr, arg);
 283         gctx->taglen = arg;
 284         return 1;
 285
 286     case EVP_CTRL_AEAD_GET_TAG:
 287         if (arg <= 0 || arg > 16 || !EVP_CIPHER_CTX_encrypting(c)
 288             || gctx->taglen < 0)
 289             return 0;
 290         memcpy(ptr, EVP_CIPHER_CTX_buf_noconst(c), arg);
 291         return 1;
 292
 293     case EVP_CTRL_GCM_SET_IV_FIXED:
 294         /* Special case: -1 length restores whole IV */
 295         if (arg == -1) {
 296             memcpy(gctx->iv, ptr, gctx->ivlen);
 297             gctx->iv_gen = 1;
 298             return 1;
 299         }
 300         /*
 301          * Fixed field must be at least 4 bytes and invocation field at least
 302          * 8.
 303          */
 304         if ((arg < 4) || (gctx->ivlen - arg) < 8)
 305             return 0;
 306         if (arg)
 307             memcpy(gctx->iv, ptr, arg);
 308         if (EVP_CIPHER_CTX_encrypting(c)
 309             && RAND_bytes(gctx->iv + arg, gctx->ivlen - arg) <= 0)
 310             return 0;
 311         gctx->iv_gen = 1;
 312         return 1;
 313
 314     case EVP_CTRL_GCM_IV_GEN:
 315         if (gctx->iv_gen == 0 || gctx->key_set == 0)
 316             return 0;
 317         CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen);
 318         if (arg <= 0 || arg > gctx->ivlen)
 319             arg = gctx->ivlen;
 320         memcpy(ptr, gctx->iv + gctx->ivlen - arg, arg);
 321         /*
 322          * Invocation field will be at least 8 bytes in size and so no need
 323          * to check wrap around or increment more than last 8 bytes.
 324          */
 325         ctr64_inc(gctx->iv + gctx->ivlen - 8);
 326         gctx->iv_set = 1;
 327         return 1;
 328
 329     case EVP_CTRL_GCM_SET_IV_INV:
 330         if (gctx->iv_gen == 0 || gctx->key_set == 0
 331             || EVP_CIPHER_CTX_encrypting(c))
 332             return 0;
 333         memcpy(gctx->iv + gctx->ivlen - arg, ptr, arg);
 334         CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen);
 335         gctx->iv_set = 1;
 336         return 1;
 337
 338     case EVP_CTRL_AEAD_TLS1_AAD:
 339         /* Save the AAD for later use */
 340         if (arg != EVP_AEAD_TLS1_AAD_LEN)
 341             return 0;
 342         memcpy(EVP_CIPHER_CTX_buf_noconst(c), ptr, arg);
 343         gctx->tls_aad_len = arg;
 344         {
 345             unsigned int len =
 346                 EVP_CIPHER_CTX_buf_noconst(c)[arg - 2] << 8
 347                 | EVP_CIPHER_CTX_buf_noconst(c)[arg - 1];
 348             /* Correct length for explicit IV */
 349             if (len < EVP_GCM_TLS_EXPLICIT_IV_LEN)
 350                 return 0;
 351             len -= EVP_GCM_TLS_EXPLICIT_IV_LEN;
 352             /* If decrypting correct for tag too */
 353             if (!EVP_CIPHER_CTX_encrypting(c)) {
 354                 if (len < EVP_GCM_TLS_TAG_LEN)
 355                     return 0;
 356                 len -= EVP_GCM_TLS_TAG_LEN;
 357             }
 358             EVP_CIPHER_CTX_buf_noconst(c)[arg - 2] = len >> 8;
 359             EVP_CIPHER_CTX_buf_noconst(c)[arg - 1] = len & 0xff;
 360         }
 361         /* Extra padding: tag appended to record */
 362         return EVP_GCM_TLS_TAG_LEN;
 363
 364     case EVP_CTRL_COPY:
 365         {
 366             EVP_CIPHER_CTX *out = ptr;
 367             EVP_ARIA_GCM_CTX *gctx_out = EVP_C_DATA(EVP_ARIA_GCM_CTX,out);
 368             if (gctx->gcm.key) {
 369                 if (gctx->gcm.key != &gctx->ks)
 370                     return 0;
 371                 gctx_out->gcm.key = &gctx_out->ks;
 372             }
 373             if (gctx->iv == c->iv)
 374                 gctx_out->iv = out->iv;
 375             else {
 376                 if ((gctx_out->iv = OPENSSL_malloc(gctx->ivlen)) == NULL) {
 377                     ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
 378                     return 0;
 379                 }
 380                 memcpy(gctx_out->iv, gctx->iv, gctx->ivlen);
 381             }
 382             return 1;
 383         }
 384
 385     default:
 386         return -1;
 387
 388     }
 389 }
 390
 391 static int aria_gcm_tls_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 392                               const unsigned char *in, size_t len)
 393 {
 394     EVP_ARIA_GCM_CTX *gctx = EVP_C_DATA(EVP_ARIA_GCM_CTX,ctx);
 395     int rv = -1;
 396
 397     /* Encrypt/decrypt must be performed in place */
 398     if (out != in
 399         || len < (EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN))
 400         return -1;
 401     /*
 402      * Set IV from start of buffer or generate IV and write to start of
 403      * buffer.
 404      */
 405     if (EVP_CIPHER_CTX_ctrl(ctx, EVP_CIPHER_CTX_encrypting(ctx) ?
 406                             EVP_CTRL_GCM_IV_GEN : EVP_CTRL_GCM_SET_IV_INV,
 407                             EVP_GCM_TLS_EXPLICIT_IV_LEN, out) <= 0)
 408         goto err;
 409     /* Use saved AAD */
 410     if (CRYPTO_gcm128_aad(&gctx->gcm, EVP_CIPHER_CTX_buf_noconst(ctx),
 411                           gctx->tls_aad_len))
 412         goto err;
 413     /* Fix buffer and length to point to payload */
 414     in += EVP_GCM_TLS_EXPLICIT_IV_LEN;
 415     out += EVP_GCM_TLS_EXPLICIT_IV_LEN;
 416     len -= EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN;
 417     if (EVP_CIPHER_CTX_encrypting(ctx)) {
 418         /* Encrypt payload */
 419         if (CRYPTO_gcm128_encrypt(&gctx->gcm, in, out, len))
 420             goto err;
 421         out += len;
 422         /* Finally write tag */
 423         CRYPTO_gcm128_tag(&gctx->gcm, out, EVP_GCM_TLS_TAG_LEN);
 424         rv = len + EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN;
 425     } else {
 426         /* Decrypt */
 427         if (CRYPTO_gcm128_decrypt(&gctx->gcm, in, out, len))
 428             goto err;
 429         /* Retrieve tag */
 430         CRYPTO_gcm128_tag(&gctx->gcm, EVP_CIPHER_CTX_buf_noconst(ctx),
 431                           EVP_GCM_TLS_TAG_LEN);
 432         /* If tag mismatch wipe buffer */
 433         if (CRYPTO_memcmp(EVP_CIPHER_CTX_buf_noconst(ctx), in + len,
 434                           EVP_GCM_TLS_TAG_LEN)) {
 435             OPENSSL_cleanse(out, len);
 436             goto err;
 437         }
 438         rv = len;
 439     }
 440
 441  err:
 442     gctx->iv_set = 0;
 443     gctx->tls_aad_len = -1;
 444     return rv;
 445 }
 446
 447 static int aria_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 448                           const unsigned char *in, size_t len)
 449 {
 450     EVP_ARIA_GCM_CTX *gctx = EVP_C_DATA(EVP_ARIA_GCM_CTX,ctx);
 451
 452     /* If not set up, return error */
 453     if (!gctx->key_set)
 454         return -1;
 455
 456     if (gctx->tls_aad_len >= 0)
 457         return aria_gcm_tls_cipher(ctx, out, in, len);
 458
 459     if (!gctx->iv_set)
 460         return -1;
 461     if (in) {
 462         if (out == NULL) {
 463             if (CRYPTO_gcm128_aad(&gctx->gcm, in, len))
 464                 return -1;
 465         } else if (EVP_CIPHER_CTX_encrypting(ctx)) {
 466             if (CRYPTO_gcm128_encrypt(&gctx->gcm, in, out, len))
 467                 return -1;
 468         } else {
 469             if (CRYPTO_gcm128_decrypt(&gctx->gcm, in, out, len))
 470                 return -1;
 471         }
 472         return len;
 473     }
 474     if (!EVP_CIPHER_CTX_encrypting(ctx)) {
 475         if (gctx->taglen < 0)
 476             return -1;
 477         if (CRYPTO_gcm128_finish(&gctx->gcm,
 478                                  EVP_CIPHER_CTX_buf_noconst(ctx),
 479                                  gctx->taglen) != 0)
 480             return -1;
 481         gctx->iv_set = 0;
 482         return 0;
 483     }
 484     CRYPTO_gcm128_tag(&gctx->gcm, EVP_CIPHER_CTX_buf_noconst(ctx), 16);
 485     gctx->taglen = 16;
 486     /* Don't reuse the IV */
 487     gctx->iv_set = 0;
 488     return 0;
 489 }
 490
 491 static int aria_gcm_cleanup(EVP_CIPHER_CTX *ctx)
 492 {
 493     EVP_ARIA_GCM_CTX *gctx = EVP_C_DATA(EVP_ARIA_GCM_CTX, ctx);
 494
 495     if (gctx->iv != ctx->iv)
 496         OPENSSL_free(gctx->iv);
 497
 498     return 1;
 499 }
 500
 501 static int aria_ccm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 502                             const unsigned char *iv, int enc)
 503 {
 504     int ret;
 505     EVP_ARIA_CCM_CTX *cctx = EVP_C_DATA(EVP_ARIA_CCM_CTX,ctx);
 506
 507     if (!iv && !key)
 508         return 1;
 509
 510     if (key) {
 511         ret = ossl_aria_set_encrypt_key(key, EVP_CIPHER_CTX_key_length(ctx) * 8,
 512                                         &cctx->ks.ks);
 513         CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L,
 514                            &cctx->ks, (block128_f) ossl_aria_encrypt);
 515         if (ret < 0) {
 516             ERR_raise(ERR_LIB_EVP,EVP_R_ARIA_KEY_SETUP_FAILED);
 517             return 0;
 518         }
 519         cctx->str = NULL;
 520         cctx->key_set = 1;
 521     }
 522     if (iv) {
 523         memcpy(ctx->iv, iv, 15 - cctx->L);
 524         cctx->iv_set = 1;
 525     }
 526     return 1;
 527 }
 528
 529 static int aria_ccm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
 530 {
 531     EVP_ARIA_CCM_CTX *cctx = EVP_C_DATA(EVP_ARIA_CCM_CTX,c);
 532
 533     switch (type) {
 534     case EVP_CTRL_INIT:
 535         cctx->key_set = 0;
 536         cctx->iv_set = 0;
 537         cctx->L = 8;
 538         cctx->M = 12;
 539         cctx->tag_set = 0;
 540         cctx->len_set = 0;
 541         cctx->tls_aad_len = -1;
 542         return 1;
 543
 544     case EVP_CTRL_GET_IVLEN:
 545         *(int *)ptr = 15 - cctx->L;
 546         return 1;
 547
 548     case EVP_CTRL_AEAD_TLS1_AAD:
 549         /* Save the AAD for later use */
 550         if (arg != EVP_AEAD_TLS1_AAD_LEN)
 551             return 0;
 552         memcpy(EVP_CIPHER_CTX_buf_noconst(c), ptr, arg);
 553         cctx->tls_aad_len = arg;
 554         {
 555             uint16_t len =
 556                 EVP_CIPHER_CTX_buf_noconst(c)[arg - 2] << 8
 557                 | EVP_CIPHER_CTX_buf_noconst(c)[arg - 1];
 558             /* Correct length for explicit IV */
 559             if (len < EVP_CCM_TLS_EXPLICIT_IV_LEN)
 560                 return 0;
 561             len -= EVP_CCM_TLS_EXPLICIT_IV_LEN;
 562             /* If decrypting correct for tag too */
 563             if (!EVP_CIPHER_CTX_encrypting(c)) {
 564                 if (len < cctx->M)
 565                     return 0;
 566                 len -= cctx->M;
 567             }
 568             EVP_CIPHER_CTX_buf_noconst(c)[arg - 2] = len >> 8;
 569             EVP_CIPHER_CTX_buf_noconst(c)[arg - 1] = len & 0xff;
 570         }
 571         /* Extra padding: tag appended to record */
 572         return cctx->M;
 573
 574     case EVP_CTRL_CCM_SET_IV_FIXED:
 575         /* Sanity check length */
 576         if (arg != EVP_CCM_TLS_FIXED_IV_LEN)
 577             return 0;
 578         /* Just copy to first part of IV */
 579         memcpy(c->iv, ptr, arg);
 580         return 1;
 581
 582     case EVP_CTRL_AEAD_SET_IVLEN:
 583         arg = 15 - arg;
 584         /* fall thru */
 585     case EVP_CTRL_CCM_SET_L:
 586         if (arg < 2 || arg > 8)
 587             return 0;
 588         cctx->L = arg;
 589         return 1;
 590     case EVP_CTRL_AEAD_SET_TAG:
 591         if ((arg & 1) || arg < 4 || arg > 16)
 592             return 0;
 593         if (EVP_CIPHER_CTX_encrypting(c) && ptr)
 594             return 0;
 595         if (ptr) {
 596             cctx->tag_set = 1;
 597             memcpy(EVP_CIPHER_CTX_buf_noconst(c), ptr, arg);
 598         }
 599         cctx->M = arg;
 600         return 1;
 601
 602     case EVP_CTRL_AEAD_GET_TAG:
 603         if (!EVP_CIPHER_CTX_encrypting(c) || !cctx->tag_set)
 604             return 0;
 605         if (!CRYPTO_ccm128_tag(&cctx->ccm, ptr, (size_t)arg))
 606             return 0;
 607         cctx->tag_set = 0;
 608         cctx->iv_set = 0;
 609         cctx->len_set = 0;
 610         return 1;
 611
 612     case EVP_CTRL_COPY:
 613         {
 614             EVP_CIPHER_CTX *out = ptr;
 615             EVP_ARIA_CCM_CTX *cctx_out = EVP_C_DATA(EVP_ARIA_CCM_CTX,out);
 616             if (cctx->ccm.key) {
 617                 if (cctx->ccm.key != &cctx->ks)
 618                     return 0;
 619                 cctx_out->ccm.key = &cctx_out->ks;
 620             }
 621             return 1;
 622         }
 623
 624     default:
 625         return -1;
 626     }
 627 }
 628
 629 static int aria_ccm_tls_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 630                               const unsigned char *in, size_t len)
 631 {
 632     EVP_ARIA_CCM_CTX *cctx = EVP_C_DATA(EVP_ARIA_CCM_CTX,ctx);
 633     CCM128_CONTEXT *ccm = &cctx->ccm;
 634
 635     /* Encrypt/decrypt must be performed in place */
 636     if (out != in || len < (EVP_CCM_TLS_EXPLICIT_IV_LEN + (size_t)cctx->M))
 637         return -1;
 638     /* If encrypting set explicit IV from sequence number (start of AAD) */
 639     if (EVP_CIPHER_CTX_encrypting(ctx))
 640         memcpy(out, EVP_CIPHER_CTX_buf_noconst(ctx),
 641                EVP_CCM_TLS_EXPLICIT_IV_LEN);
 642     /* Get rest of IV from explicit IV */
 643     memcpy(ctx->iv + EVP_CCM_TLS_FIXED_IV_LEN, in,
 644            EVP_CCM_TLS_EXPLICIT_IV_LEN);
 645     /* Correct length value */
 646     len -= EVP_CCM_TLS_EXPLICIT_IV_LEN + cctx->M;
 647     if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L,
 648                             len))
 649             return -1;
 650     /* Use saved AAD */
 651     CRYPTO_ccm128_aad(ccm, EVP_CIPHER_CTX_buf_noconst(ctx), cctx->tls_aad_len);
 652     /* Fix buffer to point to payload */
 653     in += EVP_CCM_TLS_EXPLICIT_IV_LEN;
 654     out += EVP_CCM_TLS_EXPLICIT_IV_LEN;
 655     if (EVP_CIPHER_CTX_encrypting(ctx)) {
 656         if (cctx->str ? CRYPTO_ccm128_encrypt_ccm64(ccm, in, out, len, cctx->str)
 657                       : CRYPTO_ccm128_encrypt(ccm, in, out, len))
 658             return -1;
 659         if (!CRYPTO_ccm128_tag(ccm, out + len, cctx->M))
 660             return -1;
 661         return len + EVP_CCM_TLS_EXPLICIT_IV_LEN + cctx->M;
 662     } else {
 663         if (cctx->str ? !CRYPTO_ccm128_decrypt_ccm64(ccm, in, out, len, cctx->str)
 664                       : !CRYPTO_ccm128_decrypt(ccm, in, out, len)) {
 665             unsigned char tag[16];
 666             if (CRYPTO_ccm128_tag(ccm, tag, cctx->M)) {
 667                 if (!CRYPTO_memcmp(tag, in + len, cctx->M))
 668                     return len;
 669             }
 670         }
 671         OPENSSL_cleanse(out, len);
 672         return -1;
 673     }
 674 }
 675
 676 static int aria_ccm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 677                           const unsigned char *in, size_t len)
 678 {
 679     EVP_ARIA_CCM_CTX *cctx = EVP_C_DATA(EVP_ARIA_CCM_CTX,ctx);
 680     CCM128_CONTEXT *ccm = &cctx->ccm;
 681
 682     /* If not set up, return error */
 683     if (!cctx->key_set)
 684         return -1;
 685
 686     if (cctx->tls_aad_len >= 0)
 687         return aria_ccm_tls_cipher(ctx, out, in, len);
 688
 689     /* EVP_*Final() doesn't return any data */
 690     if (in == NULL && out != NULL)
 691         return 0;
 692
 693     if (!cctx->iv_set)
 694         return -1;
 695
 696     if (!out) {
 697         if (!in) {
 698             if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L, len))
 699                 return -1;
 700             cctx->len_set = 1;
 701             return len;
 702         }
 703         /* If have AAD need message length */
 704         if (!cctx->len_set && len)
 705             return -1;
 706         CRYPTO_ccm128_aad(ccm, in, len);
 707         return len;
 708     }
 709
 710     /* The tag must be set before actually decrypting data */
 711     if (!EVP_CIPHER_CTX_encrypting(ctx) && !cctx->tag_set)
 712         return -1;
 713
 714     /* If not set length yet do it */
 715     if (!cctx->len_set) {
 716         if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L, len))
 717             return -1;
 718         cctx->len_set = 1;
 719     }
 720     if (EVP_CIPHER_CTX_encrypting(ctx)) {
 721         if (cctx->str ? CRYPTO_ccm128_encrypt_ccm64(ccm, in, out, len, cctx->str)
 722                       : CRYPTO_ccm128_encrypt(ccm, in, out, len))
 723             return -1;
 724         cctx->tag_set = 1;
 725         return len;
 726     } else {
 727         int rv = -1;
 728         if (cctx->str ? !CRYPTO_ccm128_decrypt_ccm64(ccm, in, out, len,
 729                                                      cctx->str) :
 730             !CRYPTO_ccm128_decrypt(ccm, in, out, len)) {
 731             unsigned char tag[16];
 732             if (CRYPTO_ccm128_tag(ccm, tag, cctx->M)) {
 733                 if (!CRYPTO_memcmp(tag, EVP_CIPHER_CTX_buf_noconst(ctx),
 734                                    cctx->M))
 735                     rv = len;
 736             }
 737         }
 738         if (rv == -1)
 739             OPENSSL_cleanse(out, len);
 740         cctx->iv_set = 0;
 741         cctx->tag_set = 0;
 742         cctx->len_set = 0;
 743         return rv;
 744     }
 745 }
 746
 747 #define aria_ccm_cleanup    NULL
 748
 749 #define ARIA_AUTH_FLAGS  (EVP_CIPH_FLAG_DEFAULT_ASN1 \
 750                           | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER \
 751                           | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT \
 752                           | EVP_CIPH_CUSTOM_COPY | EVP_CIPH_FLAG_AEAD_CIPHER \
 753                           | EVP_CIPH_CUSTOM_IV_LENGTH)
 754
 755 #define BLOCK_CIPHER_aead(nid,keylen,blocksize,ivlen,nmode,mode,MODE,flags) \
 756 static const EVP_CIPHER aria_##keylen##_##mode = { \
 757         nid##_##keylen##_##nmode,                  \
 758         blocksize, keylen/8, ivlen,                \
 759         ARIA_AUTH_FLAGS|EVP_CIPH_##MODE##_MODE,    \
 760         aria_##mode##_init_key,                    \
 761         aria_##mode##_cipher,                      \
 762         aria_##mode##_cleanup,                     \
 763         sizeof(EVP_ARIA_##MODE##_CTX),             \
 764         NULL,NULL,aria_##mode##_ctrl,NULL };       \
 765 const EVP_CIPHER *EVP_aria_##keylen##_##mode(void) \
 766 { return (EVP_CIPHER*)&aria_##keylen##_##mode; }
 767
 768 BLOCK_CIPHER_aead(NID_aria, 128, 1, 12, gcm, gcm, GCM, 0)
 769 BLOCK_CIPHER_aead(NID_aria, 192, 1, 12, gcm, gcm, GCM, 0)
 770 BLOCK_CIPHER_aead(NID_aria, 256, 1, 12, gcm, gcm, GCM, 0)
 771
 772 BLOCK_CIPHER_aead(NID_aria, 128, 1, 12, ccm, ccm, CCM, 0)
 773 BLOCK_CIPHER_aead(NID_aria, 192, 1, 12, ccm, ccm, CCM, 0)
 774 BLOCK_CIPHER_aead(NID_aria, 256, 1, 12, ccm, ccm, CCM, 0)
 775
 776 #endif